1261462 16292twf.doc/g 九、發明說明： 【發明所屬之技術領域】 t發明疋有關於—種光學投影裝置，且特別是有關於 -種體積#父小且厚度_的光學投影裝置。 【先前技術】 ^ 1A^與目1示習知兩種鮮投影裝置的結構示意 圖。请先苓照圖1A，習知光學投影裝置1〇〇a包括一照明 系統110a、一數位微鏡裝置(邮制micr〇 mirr〇r device, ® DMD)12〇以及一成像系統130，而數位微鏡裝置120係配 置於照明系統110與成像系統130之間。其中，照明系統 110a包括一光源I〗〕、一光積分柱（Ught integration rod)113、多個透鏡114、以及兩個反射鏡U6a、U6b。光 源112適於提供一光束112a，此光束112a經過光積分柱 113與透鏡114後，會經由反射鏡i16a反射至反射鏡 116b，再經由反射鏡116b將此光束112a反射至鄰近數位 微鏡裝置120之透鏡114。之後，光束112a會入射數位微 φ 鏡裝置120，而此數位微鏡裝置120會將光束112a轉換成 影像112a’，並使其入射成像系統13〇。接著，成像系統 ' 130會將影像112a’投影於螢幕(未繪示)上。 -請參照圖1B，其與圖1A相似，不同處在於光學投影 裝置100b之照明系統ii〇b包括一光源112、一光積分柱 113、多個透鏡114以及一反射鏡116a。光源112所提供 之光束112a經過光積分柱113與透鏡114後，會經由反射 鏡116a反射至數位微鏡裝置120，而此數位微鏡裝置120 1261 端— 成影像—，，並使其入射成像系統 130。接者，成像糸統130會將影像丨12a，投影於螢幕 示）上。 曰 上述兩種光學投影裝置論、襲在結構上是採用 成像系統130之光軸與數位微鏡裝置12〇之光軸平行的設 計，使得成像系統130與照明系統ii〇a/11〇b之間存有很 大的未利用空間50。如此，造成習知光學投影裝置1〇加、 1〇〇的整體體積較大、厚度也較厚。在現今電子產品追求 > 輕薄短小的趨勢下，習知之設計顯然不符需求。 【發明内容】 因此，本發明的目的就是在提供一種光學投影裝置， 其體積較小且厚度較薄。 基於上述與其他目的，本發明提出一種光學投影裝 置’其包括一,日、?、明系統、一反射式光閥、一成像系統以及 一第一反射元件。其中，照明系統適於提供一光束，而反 射式光閥係配置於光束的傳遞路徑上。此反射式光閥適於 ♦ 將光束轉換成一影像。此外，成像系統係配置於影像的傳 遞路徑上，而第一反射元件係配置於反射式光閥與成像系 統之間以及反射式光閥與照明系統之間，且位於光束及影 像的傳遞路徑上。此第一反射元件適於將光束反射至反射 式光閥上，並將由反射式光閥所產生之影像反射至成像系 統中。 上述之第一反射元件例如是一面鏡。其中，面鏡可為 平面鏡、曲面鏡或非球面鏡。 1261泛gtwf d〇c/g 上述之第一反射元件例如是一稜鏡，其具有一反射 層。此稜鏡之反射層適於將光束反射至反射式光閥上，並 將由反射式光閥所產生之影像反射至成像系統中。此外， 第一反射元件可具有放大率或不具放大率。 上述之知明糸統例如包括一光源與多個第一光學元 件。其中，光源適於提供光束，而第一光學元件係配置於 光束的傳遞路徑上。此外，第一光學元件例如是透鏡、平 面鏡、曲面鏡、非球面鏡、棱鏡或上述之組合。 # 上述之照明系統例如更包括一光積分柱，其係配置於 光源與第一光學元件之間。 上述之照明系統例如更包括一第二反射元件，其係配 置於第一光學元件與第一反射元件之間，以將光束反射至 第一反射元件上。其中，第二反射元件例如是一面鏡。 上述之光源例如是果燈、發光二極體、金屬鹵化物 燈、鹵素燈或南強度放電燈(high intensity discharge lamp， HID lamp) ° φ 上述之成像系統例如是一投影鏡頭。此投影鏡頭例如 包括多個第二光學元件。其中，這些第二光學元件例如是 透鏡、平面鏡、曲面鏡、亦球面鏡、棱鏡或上述之組合。 •此外，投影鏡頭例如更包括一第三反射元件，其係配置於 第二光學元件之間。另外，第三反射元件例如是一面鏡。 上述之反射式光閥例如是數位微鏡裝置或反射式單 晶矽液晶面板。 上述之光學投影裝置例如更包括一透鏡，其係配置於 7 1261462 twf.doc/g 反射式光閥與第一反射元件之間。 本發明採用一第一反射元件配置於反射式光閥與成 像系統之間以及反射式光閥與照明系統之間，以將光束反 射至反射式光閥上，並將由反射式光閥所產生之影像反射 至成像系統中◦如此，可改變成像系統配置的位置，使成 像系統緊鄰照明系統，所以本發明之光學投影裝置的整體 體積可以做得更小且更薄。 為讓本發明之上述和其他目的、特徵和優點能更明顯 易懂，下文特舉較佳實施例，並配合所附圖式，作詳細說 明如下。 【實施方式】 圖2A與圖2B分別繪示依照本發明一較佳實施例所述 之光學投影裝置的結構示意圖。請參照圖2A與圖2B，本 實施例之光學投影裝置200a/200b包括一照明系統210、一 反射式光閥220、一成像系統230以及一第·一反射元件 240。其中，照明系統210適於提供一光束212a，而反射 式光閥220係配置於光束212a的傳遞路徑上。此反射式光 閥220適於將光束212a轉換成影像212a，。此外，成像系 統230係配置於影像212a’的傳遞路徑上，而第一反射元 件240係配置於反射式光閥220與成像系統230之間以及 反射式光閥220與照明系統210之間，且位於光束212a 及影像212a’的傳遞路徑上。此第一反射元件240適於將 光束212a反射至反射式光閥220上，並將由反射式光閥 220所產生之影像212a’反射至成像系統230中。 8 I2614^twf.doc/g 上述之光學投影裝置200a/200b中，照明系統21〇例 如包括一光源212與多個第一光學元件214,其中光源212 係用以提供光束212a。此處之光源212可為汞燈、發光二 極體、金屬i化物燈、函素燈、高強度放電燈或其他適用 之光源，而在一實施例中汞燈例如是超高壓汞燈。此外， 弟光车元件214例如是透鏡、平面鏡、曲面鏡、非球面 鏡、棱鏡或上述之組合，其係配置於光束212a的傳遞路徑 上。另外，在一實施例中，照明系統210例如更包括一光 積分柱216，其係配置於光源212與第一光學元件214之 間，以使光源212所提供的光束212a，均勻化。 承上述，光束212a在通過第一光學元件214後，會 經由第一反射元件240反射至反射式光閥220上。其中， 第一反射元件240例如是一面鏡，而此面鏡可為平面鏡(如 圖2A所示）、曲面鏡(如圖2B所示）或非球面鏡。此外，第 一反射元件240可具有放大率或不具放大率。，另外，反射 式光閥220可為數位微鏡裝置、反射式單晶矽液晶面板或 其他反射式成像元件，其係用以將光束212a轉換成影像 212a’，並將影像212a’反射。 之後’由反射式光閥220所產生的影像212a，會被反 射至第一反射元件240上，而此第一反射元件24〇會再將 影像212a’反射至成像系統230中，並藉由成像系統230 將影像212a’投影於螢幕(未繪示)上。在此，成像系統23〇 例如是一投影鏡頭，其包括多個第二光學元件232，而這 些弟一光學元件232例如是透鏡、平面鏡、曲面鏡、非球 1261 偏 twf.doc/g 面鏡、稜鏡或上述之組合。 在光學投影裝置200a中，可於反射式光閥220與第 一反射元件240之間配置一透鏡250,其係用以將光束212a 收斂，以提高成像品質。 本實施例之第一反射元件240除了可將照明系統210 所提供之光束212a反射至反射式光閥220外，還可將由反 射式光閥220所產生之影像212a’反射至成像糸統230中。 換言之，在本實施例中可藉由調整第一反射元件240擺放 的角度，彎折影像212a’的傳遞路徑，進而改變成像系統 230配置的位置，使成像系統230緊鄰照明系統220。相較 於習知光學投影裝置l〇〇a、100b(如圖1A與圖1B所示）， 本實施例因成像系統230的配置位置，使其緊鄰照明系統 220，所以可使光學投影裝置200a的整體體積縮小，且厚 度變薄，以符合現今電子產品追求輕薄短小的趨勢。 此外，本實施例係採用第一反射元件240,同時反射光 束212a與影像212a’的設計，不僅可減少反射元件數量， 以節省元件成本，還可使光學投影裝置200a的體積進一步 縮小。 值得注意的是，本實施例之第一反射元件除了如圖2 A 及圖2B中所繪示之面鏡外，還可以是一稜鏡(未繪示），其 具有一反射層，而此反射層係用以將光束212a反射至反射 式光閥220上，並將由反射式光閥220所產生之影像212a， 反射至成像系統230中。 圖3繪示本發明另一實施例所述之光學投影裝置的結 1261462 16292twf.doc/g 構示意圖。請參照圖3，其與圖2A相似，以下僅針對不同 處進行說明。本實施例之光學投影裝置200c中，照明系統 210例如更包括一第二反射元件218,其係配置於第一光學 元件214與第一反射元件240之間。此第二反射元件214 例如是面鏡，其係用以將光束212a反射至第一反射元件 240 上。 圖4繪示本發明又一實施例所述之光學投影裝置的結 構示意圖。請參照圖4，其與圖2A之最大不同處在於圖4 > 之光學投影裝置200d中，成像系統230例如更包括一第三 反射元件234，而此第三反射元件234係配置於該些第二 光學元件232之間。在本實施例中，第三反射元件例如是 面鏡，其係用以改變影像212a，的傳遞路徑，使得成像系 統230内具有一折彎處。如此一來，可縮短成像系統230 的長度，進而縮短光學投影裝置200d的長度。 綜上所述，本發明之光學投影裝置至少具有下列優 點： _ 1·由於第一反射元件可改變影像之傳遞路徑，使成像 系統配置的位置緊鄰照明系統，所以本發明之光學投影裝 置的整體體積可以做得更小且更薄。 2·採用第一反射元件同時反射光束與影像的設計，不 僅可減少反射元件數量，以節省元件成本，還可使光學投 影裝置的體積進一步縮小。 3·在成像系統中配置_第三反射元件於第二光學元件 之間，可改變影像的傳遞路徑，以縮短成像系統的長度， 工261 偏 twf.doc/g 進而細短光學投影裝置的長度。 雖然本發明已以較佳實施例揭露如上，然其並非用 限定本發明，任何熟習此技藝者，在不脫離本發明之精^ 和範圍内，當可作些許之更動與潤飾，因此本發明之 範圍當視後附之申請專利範圍所界定者為準。 又 【圖式簡單說明】 圖1A與圖繪示習知兩種光學投影裝置的結構示意 圖。 、 •圖2A與圖2B分別繪示依照本發明一較佳實施例所述 之光學投影裝置的結構示意圖。 圖3给示本發明另一實施例所述之光學投影裝置的結 構示意圖。 圖4繞示本發明又一實施例所述之光學投影裝置的結 構示意圖。 【主要元件符號說明】 50 :未利用空間 • 100a、100b、2⑻a〜200d ··光學投影裝置 110、210 :照明系統 112、 212 :光源 112a、212a :光束 112a’、212a’ ：影像 113、 216 :光積分才主 114 :透鏡 116a、116b :反射!竟 12 12614^2Wfd〇c/g 120 :數位微鏡裝置 130、230 :成像系統 214 :第一光學元件 218 :第二反射元件 220 ··反射式光閥 232 :第二光學元件 234 :第三反射元件 240 :第一反射元件 φ 250 :透鏡1261462 16292twf.doc/g IX. Description of the invention: [Technical field to which the invention pertains] The invention relates to an optical projection device, and in particular to an optical projection device of a volume #father and thickness_. [Prior Art] ^ 1A^ and 1 show the structural schematic diagrams of two kinds of fresh projection devices. Referring to FIG. 1A, the conventional optical projection device 1A includes an illumination system 110a, a digital micromirror device (poster micr〇mirr〇r device, ® DMD) 12〇, and an imaging system 130, and a digital device. The micromirror device 120 is disposed between the illumination system 110 and the imaging system 130. The illumination system 110a includes a light source I], a Ught integration rod 113, a plurality of lenses 114, and two mirrors U6a, U6b. The light source 112 is adapted to provide a light beam 112a. After passing through the light integrating column 113 and the lens 114, the light beam 112a is reflected by the mirror i16a to the mirror 116b, and then reflected by the mirror 116b to the adjacent digital micromirror device 120. Lens 114. Thereafter, beam 112a is incident on digital micro-mirror device 120, and digital micro-mirror device 120 converts beam 112a into image 112a' and causes it to enter imaging system 13A. Next, imaging system '130 will project image 112a' onto a screen (not shown). Referring to FIG. 1B, which is similar to FIG. 1A, the illumination system ii〇b of the optical projection device 100b includes a light source 112, an optical integration column 113, a plurality of lenses 114, and a mirror 116a. The light beam 112a provided by the light source 112 passes through the light integrating column 113 and the lens 114, and is reflected by the mirror 116a to the digital micromirror device 120, and the digital micromirror device 120 1261 ends up as an image, and images the incident image. System 130. In succession, the imaging system 130 will project the image 丨 12a onto the screen display. The above two optical projection devices are structurally designed such that the optical axis of the imaging system 130 is parallel to the optical axis of the digital micromirror device 12, such that the imaging system 130 and the illumination system ii〇a/11〇b There is a large unused space 50 between them. As a result, the conventional optical projection device 1 has a larger overall volume and a thicker thickness. In today's electronic product pursuit > light and short trend, the design of the custom is clearly not in line with demand. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical projection apparatus that is small in size and thin in thickness. Based on the above and other objects, the present invention provides an optical projection apparatus that includes a day, a day, a bright system, a reflective light valve, an imaging system, and a first reflective element. Wherein, the illumination system is adapted to provide a light beam, and the reflective light valve is disposed on the transmission path of the light beam. This reflective light valve is suitable for ♦ converting the beam into an image. In addition, the imaging system is disposed on the transmission path of the image, and the first reflective element is disposed between the reflective light valve and the imaging system and between the reflective light valve and the illumination system, and is located on the transmission path of the light beam and the image. . The first reflective element is adapted to reflect the beam onto the reflective light valve and to reflect the image produced by the reflective light valve into the imaging system. The first reflective element described above is, for example, a mirror. The mirror can be a flat mirror, a curved mirror or an aspheric mirror. 1261 General gtwf d〇c/g The first reflective element described above is, for example, a turn having a reflective layer. The reflective layer of the crucible is adapted to reflect the light beam onto the reflective light valve and to reflect the image produced by the reflective light valve into the imaging system. Furthermore, the first reflective element can have a magnification or no magnification. The above-described knowledge system includes, for example, a light source and a plurality of first optical elements. Wherein the light source is adapted to provide a light beam and the first optical element is disposed on the transmission path of the light beam. Further, the first optical element is, for example, a lens, a flat mirror, a curved mirror, an aspherical mirror, a prism, or a combination thereof. The illumination system described above, for example, further includes an optical integration column disposed between the light source and the first optical component. The illumination system described above, for example, further includes a second reflective element disposed between the first optical element and the first reflective element to reflect the light beam onto the first reflective element. The second reflective element is, for example, a mirror. The above-mentioned light source is, for example, a fruit lamp, a light-emitting diode, a metal halide lamp, a halogen lamp or a high intensity discharge lamp (HID lamp). The imaging system described above is, for example, a projection lens. This projection lens includes, for example, a plurality of second optical elements. These second optical elements are, for example, lenses, mirrors, curved mirrors, also spherical mirrors, prisms or combinations thereof. In addition, the projection lens further includes, for example, a third reflective element disposed between the second optical elements. Further, the third reflecting element is, for example, a mirror. The above-described reflective light valve is, for example, a digital micromirror device or a reflective single crystal liquid crystal panel. The optical projection device described above further includes, for example, a lens disposed between the reflective shutter and the first reflective member. The present invention employs a first reflective element disposed between the reflective light valve and the imaging system and between the reflective light valve and the illumination system to reflect the light beam onto the reflective light valve and will be generated by the reflective light valve The image is reflected into the imaging system. The position of the imaging system configuration can be changed to bring the imaging system into close proximity to the illumination system, so that the overall volume of the optical projection device of the present invention can be made smaller and thinner. The above and other objects, features and advantages of the present invention will become more <RTIgt; 2A and 2B are schematic views showing the structure of an optical projection device according to a preferred embodiment of the present invention. Referring to Figures 2A and 2B, the optical projection device 200a/200b of the present embodiment includes an illumination system 210, a reflective light valve 220, an imaging system 230, and a first reflective element 240. The illumination system 210 is adapted to provide a light beam 212a, and the reflective light valve 220 is disposed on the transmission path of the light beam 212a. This reflective light valve 220 is adapted to convert the light beam 212a into an image 212a. In addition, the imaging system 230 is disposed on the transmission path of the image 212a ′, and the first reflective element 240 is disposed between the reflective light valve 220 and the imaging system 230 and between the reflective light valve 220 and the illumination system 210 , and Located on the transmission path of the beam 212a and the image 212a'. The first reflective element 240 is adapted to reflect the light beam 212a onto the reflective light valve 220 and to reflect the image 212a' produced by the reflective light valve 220 into the imaging system 230. 8 I2614^twf.doc/g In the optical projection device 200a/200b described above, the illumination system 21 includes, for example, a light source 212 and a plurality of first optical elements 214, wherein the light source 212 is adapted to provide a light beam 212a. The source 212 herein may be a mercury lamp, a light emitting diode, a metal i lamp, a light lamp, a high intensity discharge lamp or other suitable light source, and in one embodiment the mercury lamp is, for example, an ultra high pressure mercury lamp. Further, the light vehicle element 214 is, for example, a lens, a plane mirror, a curved mirror, an aspherical mirror, a prism, or a combination thereof, which is disposed on the transmission path of the light beam 212a. In addition, in an embodiment, the illumination system 210 further includes a light integration column 216 disposed between the light source 212 and the first optical element 214 to homogenize the light beam 212a provided by the light source 212. In response to the above, after passing through the first optical element 214, the light beam 212a is reflected by the first reflective element 240 onto the reflective light valve 220. The first reflective element 240 is, for example, a mirror, and the mirror can be a flat mirror (as shown in FIG. 2A), a curved mirror (as shown in FIG. 2B), or an aspherical mirror. Additionally, the first reflective element 240 can have a magnification or no magnification. In addition, the reflective light valve 220 can be a digital micromirror device, a reflective single crystal germanium liquid crystal panel or other reflective imaging element for converting the light beam 212a into an image 212a' and reflecting the image 212a'. The image 212a produced by the reflective light valve 220 will then be reflected onto the first reflective element 240, and the first reflective element 24 will again reflect the image 212a' into the imaging system 230 and by imaging System 230 projects image 212a' onto a screen (not shown). Here, the imaging system 23 is, for example, a projection lens including a plurality of second optical elements 232, such as a lens, a plane mirror, a curved mirror, an aspherical 1261 bias twf.doc/g mirror , 稜鏡 or a combination of the above. In the optical projection device 200a, a lens 250 is disposed between the reflective light valve 220 and the first reflective member 240 for converging the light beam 212a to improve image quality. In addition to reflecting the light beam 212a provided by the illumination system 210 to the reflective light valve 220, the first reflective element 240 of the present embodiment can also reflect the image 212a' generated by the reflective light valve 220 into the imaging system 230. . In other words, in the present embodiment, by adjusting the angle at which the first reflective element 240 is placed, the transmission path of the image 212a' is bent, thereby changing the position of the imaging system 230, so that the imaging system 230 is in close proximity to the illumination system 220. Compared with the conventional optical projection device 10a, 100b (as shown in FIG. 1A and FIG. 1B), the present embodiment can be placed adjacent to the illumination system 220 due to the arrangement position of the imaging system 230, so that the optical projection device 200a can be made. The overall volume is reduced, and the thickness is thinned to meet the trend of today's electronic products to pursue lightness and shortness. In addition, in the present embodiment, the first reflective element 240 is used, and the design of the reflected beam 212a and the image 212a' not only reduces the number of reflective elements, but also saves component cost, and further reduces the volume of the optical projection device 200a. It should be noted that, in addition to the mirror shown in FIG. 2A and FIG. 2B, the first reflective element of the embodiment may be a 稜鏡 (not shown) having a reflective layer. The reflective layer is used to reflect the beam 212a onto the reflective light valve 220 and to reflect the image 212a produced by the reflective light valve 220 into the imaging system 230. 3 is a schematic diagram showing the structure of a junction 1261462 16292 twf.doc/g of an optical projection device according to another embodiment of the present invention. Referring to Figure 3, which is similar to Figure 2A, the following description is only for differences. In the optical projection device 200c of the embodiment, the illumination system 210 further includes a second reflective element 218 disposed between the first optical element 214 and the first reflective element 240. This second reflective element 214 is, for example, a mirror that is used to reflect the beam 212a onto the first reflective element 240. 4 is a schematic view showing the structure of an optical projection device according to still another embodiment of the present invention. Referring to FIG. 4, the maximum difference from FIG. 2A is that in the optical projection device 200d of FIG. 4, the imaging system 230 further includes a third reflective component 234, and the third reflective component 234 is disposed on the optical projection device 200d. Between the second optical elements 232. In the present embodiment, the third reflective element is, for example, a mirror that is used to change the transmission path of the image 212a such that the imaging system 230 has a bend therein. As a result, the length of the imaging system 230 can be shortened, thereby shortening the length of the optical projection device 200d. In summary, the optical projection apparatus of the present invention has at least the following advantages: _1. Since the first reflective element can change the transmission path of the image so that the position of the imaging system is placed in close proximity to the illumination system, the entirety of the optical projection apparatus of the present invention The volume can be made smaller and thinner. 2. The use of the first reflective element to simultaneously reflect the beam and image design not only reduces the number of reflective components, but also saves component cost, and further reduces the size of the optical projection device. 3. Configuring the third reflective element between the second optical element in the imaging system, the image transmission path can be changed to shorten the length of the imaging system, and the length of the optical projection device is shortened by twf.doc/g. . While the invention has been described above by way of a preferred embodiment, the invention is not intended to be limited thereto, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of this application is subject to the definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A and Fig. 1A are schematic diagrams showing the structure of two conventional optical projection devices. 2A and 2B are schematic views showing the structure of an optical projection apparatus according to a preferred embodiment of the present invention. Fig. 3 is a view showing the configuration of an optical projection apparatus according to another embodiment of the present invention. Figure 4 is a schematic view showing the structure of an optical projection apparatus according to still another embodiment of the present invention. [Description of main component symbols] 50: Unused space • 100a, 100b, 2(8)a to 200d · Optical projection devices 110, 210: Illumination systems 112, 212: Light sources 112a, 212a: Light beams 112a', 212a': Images 113, 216 : Light integration master 114: Lens 116a, 116b: Reflection! Actually 12 12614^2Wfd〇c/g 120: Digital micromirror device 130, 230: Imaging system 214: First optical element 218: Second reflective element 220 ·· Reflective light valve 232: second optical element 234: third reflective element 240: first reflective element φ 250: lens
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